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Weak ELF magnetic field effects on Gonyaulax sp. bioluminescence Maja Berden*; A Zrimec; I Jerman Bion Institute, Celovska 264, -, Ljubljana, SI-1000, Slovenia      *(maja.berden@guest.arnes.si) The knowledge about mechanisms of weak, extremely low frequency (ELF) magnetic fields (MFs) influences on living systems is very poor. Although some physical theories have been proposed during the years, they are very difficult to examine empirically due to the lack of living processes which would be sensitive enough. The bioluminescence of Gonyaulax sp. proved to be very suitable for such testing. We tested the parametric resonance model (PRM) presented by Lednev in 1991. It states that the influence of weak ELF MFs on living matter depends on the ratio between the field-densities of parallel dynamic (a.c.) and static MF (d.c., in the power range of the geomagnetic field). Equally important is the dynamic field frequency, which is specific according to target ions in an ion-protein complex, e.g. Ca2+ ions in Ca2+/calmodulin complexes. MFs influence the binding energy of such complexes at certain a.c./d.c. field-density ratios. The experimental conditions were set to test the MFs influence on Ca2+ ions, which proved to be important for bioluminescence. The cells were exposed to d.c.MF of 45uT, and 35Hz a.c.MF with field-densities where the maximal influence is predicted by PRM. So far, our results are in agreement with the theory. [Talk: berden.maja.27731]

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